Ti和C可以直接在液相中反应形成TiC，并可作为渗碳体的结晶核心，使一次渗碳体和共晶渗碳体发生粒化和细化，从而避免连续网状碳化物的形成。
The alloying elements Ti and C can form TiC directly in the melt which acts as nucleus of cementite and causes both primary and eutectic cementite granulated and refined . So the cementite network in this steel can be eliminated .
一次渗碳体